Body-yoke.



F. H.. BOGART.

BODY YOKE.

APPLICATION E'ILD MAIL 24, 1910.

Patente Apr. 25, 1911 'z; A TTORNEY;

nnrrEDf s'r'rEs PA'r'ENfr orrion;

FEED H. BOGART, OF HARTFORD, CONNECTIGUT.

BODY-YOK'E.

390,621 specification of Letters Patent; Patented Apr. 25, 1911.

\ Application led March 24, 1910. Serial No. 551,332.

To a[L whom ii may concern:

Be it known that 1, FRED H. Bociana), a citizen of the United States, and a resident of Hartforcl, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Body- Yokes, of which the following is a specification.

The nerein deseribed device relates particularly to what is called the body yoke of a universal joint ntilized'in driving connections such as are einployed in automobile construction.

The object of the invention is to improve the construction and decrease the cost of production of a device of this Character.

111 the drawings-Figure 1 is a central longitudinal section of a bodyyoke member of a universal joint made in accordance with my i'nvention showing the complete joint assembled. Fig. 2 is a central longitudinal section of the yoke member. Fig. 3 is a transi'erse section on the line' 3, 3 of Fig. 1. Fig. 4 is a detail plan view of one of the bearing plates. Fig. 5 is an edge view of the same.

Referring to the drawings the body yoke as a whole is indicated at a; b is the,yoke and vc the hub bored to receive a shaft c'. The yoke is recessed as at 10 giving it a tubular form, and transversely slotted as at 12 for the greater 'part of its length; the inner wall at the end of the yoke is beveled as at 14 and has a cireumferential groove 10. The body f yoke as so far described is. made of comparatively'soft steel which can be easily machined.

The propeller shaft is mdlcated at .(,Z and has at its end a ball 20 through which a stud 22 passes transversely carrying at its end trunnion blocks' 24--24 located in the slots 12 in the walls of the yoke the trunnions being free to turn on the stud. These trunnions are of hardened metal and heretofore have had their bearing directly on the walls of the slots 12 which necessitated ha rdcning the entire yoke and then re-tinishing and grinding to correct any distortion which occurred in the hardening process.

lroa'dly considered my invention contem- 'plates widening` the slots 12-12 and facing them with strips of ha rdened met-al suitably se'cul'ed in place to form a bearing surface for the trunnion bloeks. 4ln the preferl'ed construction i use plates 30 formed up out of sheet metal with a curved central portion 32 and flat lateral faces 34-34. These lateral faces normallyl are oppositely inclined to a slight extent and only their outer edges bear on the walls of the slots. A slight clearance is left between the Curved part of the plate and the inner wall of the yoke. Sci'ews 36 having a bearing in the wall of the yoke are threaded into the Curved parts of the plates and provide means whereby the plates may be drawn down to seat these lxteral faees firmly against the walls of the s ots.

In the ordinary use of a structure of this character, and particularly when the bearing plates are formed separately from the yoke, there is a shneking or moving of the bearing plates lengthwise of the yoke, which for practical purposes Would be decidedly objectionable. In order to obviate this difficulty I form flanges 38 on the ends of the bearing plates 30, which are adapted to lie w in the grooves 1G formed circuinferentially about the inner surface of the yoke. These tlanges in engagement with these `groovcs constitute an independent means for prevent-ing any lengthwise movement between the plates and the yoke. lt will thus be scen that. after the joint is assembled complete there is no possibility of the plates shifting out of position, even though the securing screws 3G should be removed or become accidentally displaced.

There is thus provided a body-yoke structure having the required hardened bearing' surfaces and one which can be manufactu-red ing [n'ojcctions therefroln adapted to enter v4said groove.

2. A body yoke member of a universal joint formed of eomparatively soft metal the yoke end being recessed and having diametrically opposite slots, and a lpair of plates of hurdened metal arranged opposite one another within said yoke and having lateral faces adapted to overlie and have bearing on the walls ot said slots said plates and said yohe having` interengaging parts.

one another' within said yoke a ,metrically opposite slots,

3. A body yoke member of a universal joint formed of comparatively soft metal, the yoke being recessed and .having d1a`- metrically opposite slots, and-a pair' of plates formed to Shape from Sheet metal and hardened, said plates being arra ed opposite x i having lat;

eral faces adapted to overlie and -have a 4bearing on the Walls of said slots said plates and said yoke having interengaging parts. I '4. A body yoke member of a universal joint formed of colnparatively soft metal, the yoke end being reoessed and having diaa pair of plates shaped to fit within' the reoessed end of said yokze and' arranged opposite one another, and having lateral faces extending from the edges of said plates and adapted to overlie,

and have bearing on the Walls of the slots;

there being a groove formedzin the inner ``walls of the yoke and flanges on said plates adapted to lie in said grooves 5.`A body yoke lmember of a universal joint forimedof comparatvely soft metal the yoke .end being recessed and having dia- 'metrically\ oppos1te slots, plates located Within said yoke and arranged opposite to one another, `and having lateral faces projecting from'the edges of said plates and adapted to overlie the walls of said slots and normally having a bearing thereon onlyalong their outer `edges, said plates into position faces to`bear evenly on the walls of the slots and means for preventing any lengthwise moveinent of the plates in the yoke.

FRED 1-1. BoGAR'r.

means for drawing Witnesses': V

GR'J'RUDE B. LYNoH, D.' I. KREIMENDAHL.V

to cause said la'te'ral i 

